Methods, systems and apparatuses for night and day corrective ophthalmic prescription
US9072434B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2014 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Aug 19, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/063
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
One exemplary embodiment is a method for determining an ophthalmic prescription. An examination room is lighted to simulate daytime viewing and a conventional eye chart is used as a visual stimulus. A first corrective spherical lens power is determined by varying spherical lens power and identifying when perceived vision is best. The examination room is kept dark to simulate nighttime viewing conditions. The visual stimulus utilized is a white point source on a dark background, or a self illuminated symbol on a dark background. A second corrective spherical lens powered is determined by varying spherical lens power and identifying when perceived vision is best. An ophthalmic prescription such as one or more lenses, one or more surgical corrections or a combinations thereof is provided including a first corrective component including the first preferred spherical lens power, and a second corrective component including the second preferred spherical lens power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.